US National Climate Assessment: here, clear, and present danger.

Guardian: “Climate change has moved from distant threat to present-day danger and no American will be left unscathed, according to a landmark report due to be unveiled on Tuesday.”
“The National Climate Assessment, a 1,300-page report compiled by 300 leading scientists and experts, is meant to be the definitive account of the effects of climate change on the US. It will be formally released at a White House event and is expected to drive the remaining two years of Barack Obama’s environmental agenda.
The findings are expected to guide Obama as he rolls out the next and most ambitious phase of his climate change plan in June – a proposal to cut emissions from the current generation of power plants, America’s largest single source of carbon pollution.
The White House is believed to be organising a number of events over the coming week to give the report greater exposure.
“Climate change, once considered an issue for a distant future, has moved firmly into the present,” a draft version of the report says. The evidence is visible everywhere from the top of the atmosphere to the bottom of the ocean, it goes on.
….On Sunday the UN secretary-general, Ban Ki-moon, said the world needed to try harder to combat climate change. At a meeting of UN member states in Abu Dhabi before a climate change summit in New York on 23 September, Ban said: “I am asking them to announce bold commitments and actions that will catalyse the transformative change we need. If we do not take urgent action, all our plans for increased global prosperity and security will be undone.”
….Gary Yohe, an economist at Wesleyan University and vice-chair of the NCA advisory committee, said the US report would be unequivocal that the effects of climate change were occurring in real-time and were evident in every region of the country.
“One major take-home message is that just about every place in the country has observed that the climate has changed,” he told the Guardian. “It is here and happening, and we are not cherrypicking or fearmongering.”
The draft report notes that average temperature in the US has increased by about 1.5F (0.8C) since 1895, with more than 80% of that rise since 1980. The last decade was the hottest on record in the US.
Temperatures are projected to rise another 2F over the next few decades, the report says. In northern latitudes such as Alaska, temperatures are rising even faster.
….Eugene Takle, convening lead author of the agriculture chapter of the NCA report, and director of the Climate Science programme at Iowa State University, said heatwaves and changes in rainfall had resulted in a levelling off in wheat and corn production and would eventually cause declines.”